Posted Mar 05
Antithesis

Account Manager

Antithesis·London·FullTime

About the role

Antithesis is hiring Account Managers to own customer relationships after close.
You will be joining a growing global team of talented Account managers, reporting to the Head of Customer Growth, partnering and working closely with Sales, Customer Experience, and Product. You help shape how post-sales account management works at Antithesis.

You take responsibility for renewals and expansion from day one.
You work with deeply technical customers: Engineers and Engineering Leaders, CTOs and CEOs.
This is a quota-carrying role. You own revenue outcomes.

What you will do:

  • Own a book of business from initial handoff through onboarding, adoption, renewal, and expansion

  • Carry a quota tied to renewals and expansion

  • Drive on-time renewals with clear forecasting

  • Identify, scope, and close expansion opportunities

  • Build trusted relationships with customers

  • Help guide customers through onboarding, adoption, and value realization

  • Lead post-sale commercial conversations

  • Own renewal terms, pricing, and expansion proposals

  • Partner with Customer Success and Customer Experience

  • Surface product feedback grounded in customer usage

  • Track account health, risk, and growth signals

  • Contribute to renewal and expansion playbooks

  • Operate with ownership in an early-stage environment

What success looks like:

  • Strong gross and net retention

  • Predictable renewal forecasting

  • Expansion driven by real customer value

  • Long-term customer relationships

  • Clear ownership and follow-through

  • No surprise churn through early risk identification and proactive ownership

Requirements:

  • 5+ years experience in a quota-carrying Account Manager role

  • Experience at a B2B SaaS company

  • Direct ownership of renewal and expansion quotas

  • Proven record of meeting or exceeding ARR retention and growth targets

  • Experience managing a defined book of business

  • Experience running renewal and expansion deal cycles

  • Comfort owning pricing, terms, and commercial negotiations

  • Experience selling to existing customers, not prospects

  • Ability to work with technical buyers and stakeholders

  • Strong forecasting discipline and pipeline management

  • Comfort operating in a fast-moving startup

Strongly preferred

  • Experience with highly technical products, developer tools or infrastructure products

  • Experience working with engineering-led customers

  • Experience with usage-based or platform SaaS

This role is not

  • A Customer Success role without quota

  • A support or relationship-only role

  • A training role for first-time sellers

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